Cisco XR 12406 - Manual (Page 177)

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Cisco XR 12406 Router Installation Guide
OL-13831-01
Chapter 5 Maintaining the Router
Removing and Replacing an AC Power Entry Module
Installation Guidelines
The Cisco XR 12406 router support online insertion and removal (OIR). If you
are replacing a redundant power supply, you can remove and install the power
supply while the system remains powered on without causing an electrical hazard
or damage to the system. This feature enables you replace a power supply while
the
system maintains all routing information and ensures session preservation.
However, to maintain operational redundancy, proper cooling, and meet EMI
compliance standards, you must have both working power supplies installed.
When you remove a failed power supply with the router in operation, perform the
replacement as quickly as possible. Make sure you have the tools and the
replacement power supply ready before beginning the removal and installation
procedure.
Removing and Replacing an AC Power Entry Module
Although an AC PEM supports OIR, in order to maintain operational redundancy,
proper cooling, and meet EMI compliance standards, you must have both working
power supplies installed. When you remove a failed power supply with the router
in operation, perform the replacement as quickly as possible. Make sure you have
the tools and the replacement power supply ready before beginning the removal
and installation procedure.
Use the following procedure to remove and replace an AC PEM.